Movable Fence Control for Medium Stacking Defects
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing medium stacking devices face challenges in maintaining proper alignment and preventing stacking disorders due to changes in medium properties, such as friction coefficient and deformation, when printing, as simply adjusting the movable fence based on discharge medium information is insufficient.
Innovation Solution
A medium stacking device with a movable fence and a control section that adjusts the fence's movement amount based on both medium information and printing information to resolve placement defects, including leaning and deformation, by determining optimal retreat and restriction positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the movable fence is adjusted based only on discharge medium information, then the device complexity is reduced, but the manufacturing precision of medium placement deteriorates due to medium property changes during printing
Solution Approach 1:
The control section dynamically adjusts the movable fence's movement amount based on printing information (ink ejection amount, print area ratio) that reflects changes in medium properties during printing. This parameter-based adaptation resolves the contradiction by using real-time printing data to compensate for medium deformation and friction changes, maintaining placement precision without requiring complex mechanical structures
Solution Approach 2:
The system uses printing information as feedback to adjust the movable fence position. The control section calculates the movement amount based on the relationship between ink ejection and medium property changes, creating a closed-loop control system that maintains precision while keeping the device structure relatively simple
2Ease of operation
If the movable fence movement amount is fixed, then the ease of operation is improved, but the adaptability to different medium and printing conditions deteriorates
Solution Approach 1:
The movable fence transitions from a static position to a dynamic, adaptive position based on printing conditions. The control section automatically calculates and adjusts the fence movement amount according to real-time printing information, making the system adaptable to different medium types and printing parameters while maintaining ease of operation through automated control
Solution Approach 2:
The system changes the fence movement parameter dynamically based on printing information such as ink ejection amount and print area ratio. This parameter adaptation enables the system to handle various medium properties and printing conditions automatically, resolving the contradiction between operational simplicity and adaptability
3Manufacturing precision
If the movable fence retreats to resolve placement defects, then the manufacturing precision is improved, but the productivity decreases due to additional movement cycles
Solution Approach 1:
The control section performs preliminary calculation of the optimal fence movement amount based on printing information before the medium is discharged. By predicting the required adjustment in advance based on ink ejection characteristics, the system minimizes the number of retry cycles needed to resolve placement defects, thus maintaining productivity while improving precision
Solution Approach 2:
The fence movement amount is optimized as a dynamic parameter based on printing conditions. By calculating the precise movement needed in advance using printing information, the system reduces unnecessary movements and retry cycles, balancing precision improvement with productivity maintenance
Data Source
AI summary
The medium stacking device 30 includes a stacking platform 31 on which the image printed medium M can be placed, a movable fence MF that moves between a restriction position that restricts the edge portion of the medium M to be discharged toward the stacking platform 31 and a retreat position retreated from the restriction position, and the control section 93 that performs the control to move the movable fence MF from the restriction position to the retreat position and back to the restriction position when a placement defect of the medium M on the stacking platform 31 is detected, wherein the control section 93 determines the movement amount MA from the restriction position to the retreat position based on the medium information of the medium M and the printing information of the image.